Welt-channeling attachment for sole-sewing machines.



M. E. HARADON.

WELT GHANNELING ATTACHMENT FOR SOLE SEWING MACHINES.

APPLIUATION FILED EEBA, 1907.

Patented Oct. 13,1908.

WQWYM UNITED STATES PATENT OFFICE.

MELVIN E. HARADON, OF BROCKTON, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

Patented Oct. 13, 1908.

Application filed February 4, 1907. Serial No. 355,533.

To all whom it may concern:

Be it known that I, MELVIN E. HARADON, a citizen of the United States, residing at Brockton, in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in Welt- Channeling Attachments for Sole-Sewing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to welt channeling attachments for sole sewing machines which are adapted to unite the welt and outsole of a shoe.

In many shoe factories it is now customary to sink the stitches of the out seam below the surface of the welt, especially around the forepart of the shoe. To enable this to be done a stitch receiving channel in the form" of a groove or slit is cut in the upper surface of the welt either prior to or during the opertion of sewing the seam. Several forms of welt channeling attachments for sole sewing machines have been devised whereby the welt can be channeled during the sewing operation. In one of these attachments the welt channeling knife is formed upon the free end of an arm, pivotally mounted upon a movable slide below the work support, the free end of the arm extending through the needle slot of the work support and engaging the work support so that the cutting blade of the knife is projected or retracted whenever the slide is moved by the operator during the sewing operation.

The present invention is intended primarily as an improvement in the form of welt channeling attachment above referred to, the principal object of the invention being to provide a welt channeling attachment which can be constructed more easily and at less expense and which can be more readily applied to the sewing machine.

Other objects of the invention are to provide a welt channeling attachment for sole sewing machines which is simple in construction and more durable than attachments which have heretofore been devised, to provide a welt channeling attachment in which the channeling knife can be more readily adjusted to the desired position in the machine, and in general to simplify and improve the various parts of welt channeling attachments.

With the above objects in view the resent inventionconsists in the welt channe ing attachment for sole sewing machines hereinafter described, as defined in the claims.

The preferred. form of the present invention is illustrated in the accompanying drawing in which Figure 1 is a view in front elevation of the preferred form of the attachment together with so much of a sole sewing machine as is necessary to show the connection of the attachment therewith. Fig.2 is a view in side elevation of a portion of the mechanism illustrated in Fig. 1 with the work support of the machine shown in section. Fig. 3 is a detail sectional view taken on the line 3-3 of Fig. 2, illustrating the manner in which the knife carrier is mounted and the manner in which the channeling knife is secured in the carrier; and Fig. 4 is a detail view of the upper end of the channeling knife looking in the opposite direction from Fig. 2.

In the drawing, 1 indicates the curved hook needle, 2 the Work support, 3 the feed slide and 4 the feed changing lever of a sole sewing machine, such for instance as is disclosed in the atent to French and Meyer No..473,870, ated April 26, 1892. 5 indicates the edge gage with which this machine is usually provided and 6 the slide upon which the edge gage is mounted. The s ide 6 is adapted to move horizontally upon a guide 7 and is connected to the lever 4 of the feed changing mechanism by means of a link connecting the lever 4 to an arm 8 secured to the lower end of a short rook shaft 9, journaled in a block 10, the upper end of which rock shaft is provided with a slotted crank arm 11 engaging a lug projecting downwardly from the slide 6.

The parts above described are constructed and arranged to operate in a well known manner and further description thereof is considered unnecessary.

In the illustrated embodiment of the present invention a knife carrier 12 is pivotally mounted by means of a pivot pin 13 upon one side of the standard which rises from the slide 6. This knife carrier is provided with a socket to receive the lower end of the channeling knife and is slotted, as indicated at 14, to form a clamp by which the knife can be rigidly secured to the carrier. The jaws of the clamp are actuated to grip the knife by means of a clamping bolt 15. The channeling knife, indicated at 16, is preferably formed of a wire, circular in cross section, and ground at its upper end to form a channel cutting blade 17. The wire is bent, as indicated in Figs. 1 and 2, to enable the blade carrying end of the wire to extend upwardly through the needle slot in the work support so as to be in the proper position to cut a stitch receiving channel in the welt in advance of the operation of the needle,

The operation of the welt channeling attachment above described will be readily understood from an inspection of Fig. 2, from which it will be seen that a movement of the slide 6 towards the right will act to project the blade of the channel knife into operative position above the surface of the work support, and that a movement of the slide 6 to the left will act to retract the blade of the channel knife below the surface of the Work support into inoperative position.

In the machine illustrated in the drawing the knife carrier is mounted upon the slide which carries the edge gage, which gage, during the sewing operation, is moved by the operator so as to be in an advanced position while the forepart of the shoe is being sewed and in a retracted position while the shank portion of the shoe is being sewed. The welt channeling knife is thus thrown into 0 eration as the sewing progresses from t e shank on to the forepart and is thrown out of operation as the sewing progresses from the forepart on to the shank.

The channeling knife 16 can be adjusted longitudinally to vary the depth of the out produced by the blade, and it will be noted that the range of adjustment is sufficient to permit a considerable portion of the upper end of the knife to be ground away in shar ening and reforming the blade before the knife is worn out. The knife 16 can also be rotatably adjusted so as to bring the upper end of the knife into the desired position.

The nature and scope of the present invention having been described and the preferred form of the invention having been specifically described, what is claimed is 1. A sole sewing machine, having, in combination with the stitch forming devices, a work support, a pivotally mounted. knife carrier, a welt channeling knife engaging the work support and secured to the knife carrier so as to be adjustable thereon to vary the depth of cut, and a support for the knife carrier movable with relation to the work support to project the'knife.

2. A sole sewing machine, having, in combination with the stitch forming devices, a work support, a pivotally mounted knife carrier, a welt channeling knife consisting of a wire provided at one end with a cutting blade, means for securing the wire in the knife carrier-with its blade carrying end in engagement with the work support constructed to permit longitudinal and rotary adjustment of the wire, and a support for the knife carrier movable with relation to the work support to project the knife.

3. A sole sewing machine, having, in combination with the stitch forming devices, a work support, a knife carrier, a welt channeling knife consisting of a wire provided at one end with a cutting blade, and means for securing the wire in the knife carrier with its blade carrying end in engagement with the work support and a support for the knife carrier movable with relation to the work support to project the knife.

In testimony whereof I allix my sign ature, in presence of two witnesses.

MELVIN E. HARADON.

Witnesses:

PETER J. MULEGAN, CHARLES H. WHITMAN. 

